Applicators for adhesives



Feb. 28, 1961 HARIAN 2,972,773

APPLICATORS FOR ADHESIVES Filed Dec. 18. 1958 FIG].

INVENTOR.

Kent Harian QMQSW azzor r gl v United States Patent 20 APPLICATORS FOR ADHESIVES Kent Harian, Paramus, N.J., assignor to La France Carazetsi Inc., New York, N.Y., a corporation of New Filed Dec. 18, 1958, Ser. No. 781,332

1 Claim. (Cl. 15560) This invention relates to applicators for adhesives, and more particularly to a type of applicator especially adapted for applying glue or other coating liquid to the edges or other surfaces of sheet material, such as carpeting, plywood, tiles and many other articles.

It is an object of this invention to provide a device in the form of an applicator which will apply the glue evenly in the form of a uniform coating over the surface for which the glue is intended. It is an object of the invention to provide a device of this character in which the flow of the adhesive can be regulated and with which the application of the glue can be speedily applied and without waste.

It is an object of the invention to provide an applicator having a casing formed with an opening and through which a knurled applicator roller protrudes in a position to permit of its ready applicationagainst the surface to be glue-coated; to provide means by which the casing may be supplied with a flow of the adhesive delivered into the casing for pick-up by the roller during its rotation when applying the adhesive.

With these and other objects to be hereinafter set forth in view, I have devised the arrangement of parts to be described and more particularly pointed out in the claim appended hereto.

In the accompanying drawing, wherein an illustrative embodiment of the invention is disclosed,

Fig. 1 is a side elevational view of an adhesive applicator constructed according to the invention;

Fig. 2 is a sectional view, taken substantially on the line 22 of Fig. 1, looking in the direction of the arrows;

Fig. 3 is a side-elevational view of the adhesive-applying roller, and

Fig. 4 is a vertical sectional view through the applicator head.

Referring to the drawing, 1 indicates the body of the applicator head. In the form shown, it consists of a relatively shallow, fiat receptacle of triangulated form. However, this specific form is not essential since the head may be made in other forms for specific purposes. The body 1 defines a glue chamber 2 into which the glue or other adhesive is delivered or fed from the tubular glue container shown at 12.

The body 1 of the applicator head is provided at its forward or narrower end with an opening 9 through which the peripheral part of a glue-applying roller 6 protmdes in a position to enable it to be readily applied to an edge of sheet material, such as carpeting, plywood, tiles or other articles for the application of glue thereto.

The peripheral edge 11 of the roller 6 is knurled, serrated or otherwise roughened to enable the glue tobe carried by it and applied in sufficient quantity to the surface for which the glue is intended. The roller is mounted for rotative movement on a spindle 8 located in the head of the applicator and maintained between the body 1 and the cover 4 fitted thereover.

The cover 4 closes the top of the glue-containing cham- 'ice her 2 in which the glue 3 is contained, and the cover conforms generally in shape to the body 1 and snugly fits thereon to prevent leakage between it and the body 1. Thecover may be held on by screws or other fastening means not shown.

The glue or other liquid material to be applied by the roller 6 is contained in the tubular container shown at 12 and the container 12 is provided at one end, shown as the upper end in Fig. 1 with an air control valve (not shown) by which the flow of the glue from the container may be controlled. At its opposite end the container is provided with a tubular outlet 13 which is internally threaded. for coupling to the externally threaded nipple 5 provided on the cover member 4 of the head of the applicator.

The element shown at 10 is a flow control for the air valve by which the rate of flow of the adhesive into the head is regulated.

At the forward end of the applicator below the roller 6 is provided a projecting lip 7 adapted for insertion under the sheet material to raise or lift the same and bring the edge thereof to be coated into contact with the projecting part 11 of the roller 6 and thereby receive a charge of the glue therefrom.

The projecting lip 7 is a forward, integral extension of the flat bottom wall of the glue container and the lower face of the lip 7 is in the same plane as the bottom face of said wall. The lip 7 terminates at its forward end in a relatively sharp edge 15 and has its upper surface 16 inclined upwardly and rearwardly so that the lip is wedge-shaped in cross section. The sharp edge 15 is arouately curved, as shown in Fig. 2. The loca tion and shape of the lip 7 is such as to enable the device to be slid along any flat surface to easily project the lip below carpeting or other material lying thereon to thus slightly elevate the carpeting and enable the roller 6 to apply glue against the edge of the carpeting. The flat bottom face of the lip, being in the same plane as the bottom face of the glue container, taken with the wedge shape and forward curved edge of the lip, enables the lip to slide easily and quickly under the carpeting while acting to lift it. It also acts as a guard and serves to confine the glue to the edge of the carpeting and prevnts entry of the glue under the lower face of the carpeting.

From the foregoing, the operation of the improved glue applicator will be readily apparent. The container 12 supplies the interior of the head, composed of the casing parts 1 and 4, with a supply of glue, the flow of the glue thereinto being controlled by the control means 14 and 15. As the roller 6 is moved over the area to be glue-coated, the projecting, roughened or knurled surface 11 of the roller, projecting out of the aperture 9, will contact with and apply a smooth and even coating of the adhesive to the surface with which it contacts. The application of the glue to the surface to be coated is fast and uniform; the glue can be applied accurately and without waste to any required surface.

While I have herein suggested that the improved applicator is especially adapted for use in connection with the application of glue or adhesive, it will be apparent that it might well be applied to other uses, wherein liquids of other kinds are required to be placed on surfaces.

Having thus described a single embodiment of the invention, it is obvious that the same is not to be re stricted thereto, but is broad enough to cover all structures coming within the scope of the annexed claim.

What I claim is:

An applicator for adhesive comprising, a glue-container consisting of a shallow, triangulated, flat receptacle having a top wall, a bottom wall and a surrounding side wall, the forward end of the container being narrower than the rear end, the side wall having an aperture located at said forward end of the container, a roller mounted within the container on an axis perpendicular to the bottom wall and having a portion of its periphery projecting out of the aperture for application against a surface to be glue-coated, a glue holder connected to the top wall of the container and disposed at right angles to the plane of said top wall and with its axis substantially parallel to the axis of the roller, said glue holder supplying glue into the container While the bottom wall of the container is flatly disposed against a surface, the bottom wall of the glue container having an integral extension in the form of a lip projecting wholly forwardly of the projecting peripheral part of the roller, said lip having its under surface in the plane of the entire lower face of the bottom Wall of the container, said lip being wedge-shaped and having a relatively sharp forward edge and having its upper face inclined upwardly from its sharp forward edge to the rear of said lip at the periphery of said roller, said forward edge of the lip being arcuately curved, the shape of said lip tending to elevate carpeting under which it is inserted to thereby bring the elevated edge of the carpeting against the periphery of the roller When the bottom wall of the container is moved along a flat surface on which the carpeting is resting.

References Cited in the file of this patent UNITED STATES PATENTS 2,117,023 Eklov May 10, 1938 2,206,153 Berggruen July 2, 1940 2,300,919 Heilman Nov. 3, 1942 2,525,291 Frosberg Oct. 10, 1950 2,713,694 Soldan July 26, 1955 2,816,308 Schultz Dec. 17, 1957 FOREIGN PATENTS 265,139 Italy May 25, 1929 

